Enchroma Gilman - Color Blind Glasses Plastic Acetate frame Enchroma Sunglass Lens: Medium density, plastic lens Proprietary color-enhancing spectral filter. Lens width: 52 millimeters Lens height: 40 millimeters Bridge: 19 millimeters Arm: 148 millimeters Frame fit: Adult regular Frame color: Grey Sunglass lenses Anti-reflection coated for maximum optical clarity. Super hydro-phobic top-coat: easy to clean.